I've been reading every thread I can find on- and off-site trying to find which pads I need to buy for a full thermal pad replacement on my 3080 FTW3 Ultra. I'm kind of dumbfounded I haven't found a list of which and how many pads to buy.
 
Have you actually done the mod? Which pads did you buy? How much of each thickness? How much leftover did you have?
 
Money's tight, so I'm not very excited to just guess at how much mm^2 to buy based on guesses from photos, y'know?
 
Thanks in advance, everyone!

ty_ger07
Most people haven't done it because it is a waste of your time.  Money is tight?  Well, the best choice is to not do it at all.
 
People who have done it have spent a lot of time and money trying over and over to get good contact, and usually their results are the same or worse than stock.

 
Really? I keep reading about results of ~8C reduction across all sensors.


When I say money's tight, I mean to say that I've got $50 (cheaper than a night at the bar eh) set aside to enjoy modding my GPU and getting some better thermals, and wouldn't like to have to re-do it or wait for extra material to come in. Even if I don't get amazing results, the process itself is fun, right?

Just duplicating some information here:

EVGATech_LeeM:
 
3090/3080 FTW3 HYBRID/HYBRID Kit Pads:

Thermal pads for VRAM heatsink:
2pcs: 49mm x 13mm x 2.25mm
1pcs: 37.5mm x 12mm x 2.25mm
1pcs: 13mm x 13mm x 2.25mm
 
Thermal pads for standalone heatsink:
1pcs: 80mm x 4.5mm x 2.25mm
1pcs: 75mm x 11mm x 0.75mm - Note: This thermal pad is not initially on the HYBRID card.  Thermal putty is used in its place.  If you remove/clean the thermal putty, then replace it with a thermal pad of these dimensions.
 
Thermal pads for heatsink connected to the fan:
1pcs: 106mm x 5mm x 2.25mm
1pcs: 105mm x 11mm x 0.75mm - Note: This thermal pad is not initially on the HYBRID card.  Thermal putty is used in its place.  If you remove/clean the thermal putty, then replace it with a thermal pad of these dimensions.

that fujipoly is good one but not with EVGA GPU, I have tried it because they always use n+0.25 mm thickness and their stock pad has very low hardness while Fujipoly hardness is 80. The one I think is best fit is Gelid GP-Extreme ( 12 WK/M) just if that pad has 2.25 mm thickness they are using in 3000 series cards. 

I've done it for the 3090. Reduced the temps by a bit

Agonising Dread
I used 2mm Thermalright Extreme Odyssey, but i had mixed results at first. Memory Junction temps still hovered around 98 and 100c. Finally found some Graphite Thermal pad in the correct size of 0.25mm, put it directly on the thermal pad onto the memory and VRM and it reduced my junction temp from 100c to 76c! I highly recommend this to achieve the correct compression from the comparable stock thermal pad. 
 
 

Pretty neat.  IMHO the needed compression is to get micro contact of the pads to the surfaces, in particular the memory is not smooth.  That's why some people have luck with a thin coat of normal thermal paste on the pads. 
 
Overall though most EVGA cards should be totally fine unless you are mining in warm temps and don't have good cooling or turn up the fans.

NewValaric
I I am also scared (removed) of messing up

Fear is an excellent motivator.  Caution is justified, this is not like swapping out some ram sticks or putting in a new fan.

z4KJ0N3S
Just duplicating some information here:

EVGATech_LeeM:

3090/3080 FTW3 HYBRID/HYBRID Kit Pads:

Thermal pads for VRAM heatsink:
2pcs: 49mm x 13mm x 2.25mm
1pcs: 37.5mm x 12mm x 2.25mm
1pcs: 13mm x 13mm x 2.25mm

Thermal pads for standalone heatsink:
1pcs: 80mm x 4.5mm x 2.25mm
1pcs: 75mm x 11mm x 0.75mm - Note: This thermal pad is not initially on the HYBRID card.  Thermal putty is used in its place.  If you remove/clean the thermal putty, then replace it with a thermal pad of these dimensions.

Thermal pads for heatsink connected to the fan:
1pcs: 106mm x 5mm x 2.25mm
1pcs: 105mm x 11mm x 0.75mm - Note: This thermal pad is not initially on the HYBRID card.  Thermal putty is used in its place.  If you remove/clean the thermal putty, then replace it with a thermal pad of these dimensions.

If you use thermal pads instead of putty, and you need to RMA, do you have to put the putty back?

Not meaning to hijack the topic but the question is relevant:
 
What exactly is "thermal putty" and under what brands we find it in the markets? I have a hard time even explaining what I need in greek stores. Thanks for the help.

homestyle

z4KJ0N3S
Just duplicating some information here:

EVGATech_LeeM:

3090/3080 FTW3 HYBRID/HYBRID Kit Pads:

Thermal pads for VRAM heatsink:
2pcs: 49mm x 13mm x 2.25mm
1pcs: 37.5mm x 12mm x 2.25mm
1pcs: 13mm x 13mm x 2.25mm

Thermal pads for standalone heatsink:
1pcs: 80mm x 4.5mm x 2.25mm
1pcs: 75mm x 11mm x 0.75mm - Note: This thermal pad is not initially on the HYBRID card.  Thermal putty is used in its place.  If you remove/clean the thermal putty, then replace it with a thermal pad of these dimensions.

Thermal pads for heatsink connected to the fan:
1pcs: 106mm x 5mm x 2.25mm
1pcs: 105mm x 11mm x 0.75mm - Note: This thermal pad is not initially on the HYBRID card.  Thermal putty is used in its place.  If you remove/clean the thermal putty, then replace it with a thermal pad of these dimensions.

If you use thermal pads instead of putty, and you need to RMA, do you have to put the putty back?

I RMAd my 3080 FTW3 ultra last year, and EVGA did not make me put the putty back. I used 1mm thermal pads in place of the putty and my RMA was accepted with no issues. I don't know what their policy is now (with all the RMAs), but I'd assume you're fine as long as there is no damage to the card. The worst case scenario is that they charge you for thermal putty.

BiggyNewton

homestyle

z4KJ0N3S
Just duplicating some information here:

EVGATech_LeeM:

If you use thermal pads instead of putty, and you need to RMA, do you have to put the putty back?

No and trust me cleaning the putty off is a pita to begin with.  I had mixed results when doing my 3080, followed a guide someone posted on here too.  I bought some slimmer pads to stack where there might be poor contact and I'm going to try to use some plastic washers on the 4 core screws.

Really??? What were you doing wrong....took me all of 5 min to clean it off both a 3080 and a 3080Ti....no big deal at all ! I have done this several times swapping Stock coolers to Blocks....and also never ever "stack" thermal pads.....in all fairness a "rookie mistake"...thermal pads are not designed to be stacked.....enjoy reading some of these "McGiver GPU Mods"....